ZÜBLIN Spezialtiefbau (STRABAG sub absorbed BAUER Austria 22 May 2025) + Keller Grundbau + PORR Tiefbau + Implenia, ÖNORM B 1997-1-1 + B 1997-1-2 + B 1997-1-3 + AVRAG + LSD-BG.
Austrian Spezialtiefbau / foundations specialty workforce against ZÜBLIN Spezialtiefbau GmbH Austria (STRABAG SE subsidiary; acquired the Austrian unit of BAUER Spezialtiefbau Ges.m.b.H. — BAUER AG sale finalised 22 May 2025; full integration under ZÜBLIN Spezialtiefbau brand to complete by 2026; consolidates Austria's two largest piling/diaphragm-wall contractors under STRABAG SE), Keller Grundbau Ges.m.b.H. (wholly owned by Keller Group plc — LSE KLR; founded in Austria 24 January 1969; six regional branches; full Spezialtiefbau scope — bored piles + jet grouting Soilcrete + vibro-replacement stone columns), PORR Bau GmbH — Tiefbau division (PORR AG subsidiary — Wiener Börse ATPOR POS; operates specialty-foundations works in-house through PORR Tiefbau), and Implenia Spezialtiefbau Austria (Implenia AG — SIX IMPN division; involved in Semmering and other deep-civils works in Austria) — BAUER Spezialtiefbau Ges.m.b.H. IKEA Westbahnhof Vienna (king-pile wall + deep foundations for 7-storey IKEA furniture store; deepest drillings 36 m; counterparty IKEA Austria) + ZÜBLIN acquisition of BAUER Spezialtiefbau Austria (STRABAG/ZÜBLIN press release 22 May 2025; full brand integration by 2026) + Semmering Base Tunnel ground-stabilisation / shaft sinking (Implenia + HOCHTIEF + Thyssen Schachtbau JV SBT 1.1 Gloggnitz EUR 457 m; shaft and special-foundation scope inside lot). ÖNORM B 1997-1-1 (2021-06-01) Austrian National Annex to EN 1997-1 + ÖNORM B 1997-1-2 (2021-08-15) Spread foundations + ÖNORM B 1997-1-3 Pile foundations + ÖNORM B 1997-1-5 (2017-11-01) Overall stability + LSD-BG + ZKO-3 + BUAK + KV Bauindustrie + Finanzpolizei + Arbeitsinspektion + Bundesinnung Bau.
Request Technical BriefingRegulator exposure profile
- ÖNORM B 1997-1 series + EN 1997-128%
- LSD-BG + ZKO + BUAK26%
- KV Bauindustrie + Bundesinnung Bau24%
- Finanzpolizei + Arbeitsinspektion22%
ZÜBLIN + Keller Grundbau cert architecture per worker.
Austrian foundation-specialty cert convergence against ZÜBLIN Spezialtiefbau (STRABAG SE) / Keller Grundbau (Keller Group KLR) / PORR Bau Tiefbau (POS) / Implenia Spezialtiefbau Austria (IMPN) × ÖNORM B 1997-1 series + AVRAG + LSD-BG + ZKO + BUAK + KV Bauindustrie.
STRABAG group / Spezialtiefbau prime side
ZÜBLIN Spezialtiefbau + Keller Grundbau
- ÖNORM B 1997-1-1 (2021-06) Eurocode 7 Austria NA
- ÖNORM B 1997-1-3 Pile foundations ULS+SLS
- Bored piles + jet grouting Keller Soilcrete + vibro stone
PORR/Implenia in-house side
PORR Tiefbau + Implenia Spezialtiefbau Austria
- ÖNORM B 1997-1-2 (2021-08) Spread foundations
- ÖNORM B 1997-1-5 (2017-11) Overall stability slopes
- BUAK + KV Bauindustrie AT construction wage + leave
Boundary specialty worker
Pre-cleared on ÖNORM B 1997-1 + ZKO + BUAK
Named projects in this jurisdiction
- BAUER Spezialtiefbau Ges.m.b.H. IKEA Westbahnhof Vienna (king-pile wall + deep foundations for 7-storey IKEA furniture store; deepest drillings 36 m; counterparty IKEA Austria; note BAUER Austria absorbed by ZÜBLIN 22 May 2025) BAUER Austria → ZÜBLIN (STRABAG)
- ZÜBLIN acquisition of BAUER Spezialtiefbau Austria (STRABAG/ZÜBLIN press release 22 May 2025; full brand integration by 2026; consolidates Austria's two largest piling/diaphragm-wall contractors under STRABAG SE) STRABAG SE / ZÜBLIN Spezialtiefbau 2025
- Semmering Base Tunnel ground-stabilisation / shaft sinking (Implenia + HOCHTIEF + Thyssen Schachtbau JV SBT 1.1 Gloggnitz EUR 457 m; shaft and special-foundation scope inside lot) Implenia Spezialtiefbau Austria
- ZÜBLIN Spezialtiefbau GmbH Austria (STRABAG SE subsidiary) + Keller Grundbau Ges.m.b.H. (Keller Group plc LSE KLR; founded AT 24 January 1969; six regional branches) + PORR Bau GmbH Tiefbau division (POS Wiener Börse) + Implenia Spezialtiefbau Austria (IMPN SIX) ZÜBLIN + Keller + PORR + Implenia
Austrian Spezialtiefbau: ZÜBLIN Spezialtiefbau (STRABAG sub; absorbed BAUER Austria 22 May 2025), Keller Grundbau (Keller KLR; AT since 1969), PORR Tiefbau (POS), Implenia Spezialtiefbau Austria (IMPN). Semmering SBT 1.1 EUR 457 m. ÖNORM B 1997-1 series + AVRAG + LSD-BG + BUAK govern.
01. Pre-pricing — KV Bauindustrie + BUAK
KV Bauindustrie wage floor per worker. BUAK 2-week notify pre-deployment. AFS 2007:1-equivalent special permit for confined-space and ground works.
02. ZKO + A1 + ÖNORM B 1997-1 familiarisation
ZKO-3 Meldung per posted worker. A1 portable document. ÖNORM B 1997-1 series Eurocode 7 Austria NA familiarisation per piling-rig operator + foreman.
03. BUAK + Finanzpolizei + Bundesinnung Bau onboarding
BUAK registration + monthly contributions. Finanzpolizei + Arbeitsinspektion joint inspections. Bundesinnung Bau (WKO) sectoral employer compliance.
04. BMF + BUAK-defensible evidence pack
Minimum pack: Austria-bank-traceable remuneration, German-language contract, A1 receipt, ZKO-3 receipt, BUAK receipts, KV Bauindustrie reconciliation, ÖNORM B 1997-1 competency per piling-rig operator.
05. India and Gulf sourcing corridors — the Austria foundations pathway
Indian Larsen & Toubro Heavy Civil + Gulf Saudi Binladin / Six Construct deep-foundation pools route through ZKO + LSD-BG + BUAK + ÖNORM B 1997-1 audit-grade chain-of-custody against ZÜBLIN Spezialtiefbau, Keller Grundbau, PORR Tiefbau, or Implenia Spezialtiefbau Austria scopes.